Quick answers
- Does Armine Nadiryan accept Medicare assignment?
- Yes. Medicare's clinician data says Armine Nadiryan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Armine Nadiryan see?
- In 2024, CMS data shows 412 Original Medicare patients and 1,268 services for Armine Nadiryan. This counts Original Medicare only and measures volume, not quality.
- What is Armine Nadiryan's NPI number?
- 1346477486. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Armine Nadiryan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 412 |
|---|---|
| Services billed to Medicare | 1,268 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)677 services
- Hospital discharge day management, more than 30 minutes (99239)213 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)159 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)135 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)49 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Ischemic heart disease56%
- Heart failure55%
- Chronic kidney disease53%
Hospitals where Armine Nadiryan works
Medicare's Facility Affiliation Data lists Armine Nadiryan at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020
- St Lukes HospitalChesterfield, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260179
Practice locations
Addresses where Armine Nadiryan is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 10010 Kennerly RdSaint Louis, MO 63128 (314) 525‑1328
- 232 S Woods Mill RdChesterfield, MO 63017 (314) 434‑1500
- 232 S Woods Mill Rd Dept ofChesterfield, MO 63017 (314) 542‑4897
- 232 S Woods Mill Rd Dept of Ob/gynChesterfield, MO 63017 (314) 434‑1500
- 232 S Woods Mill Rd HospitalistChesterfield, MO 63017 (314) 434‑1500
Group practices
Medicare enrollment lists Armine Nadiryan as a member of these groups (CMS data updated October 2, 2026).
- St Anthonys Physician Organization Hospitalist Services LC144 clinicians in the group
- Physician Specialists of St Lukes LLC82 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in St Anthonys Physician Organization Hospitalist Services LC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1997 (29 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346477486 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians